[ale] IPSec question

Allan Neal allanneal at bellsouth.net
Tue Jul 20 10:59:30 EDT 2004


Chris,

That depends on the NAT device and firewall you are going through.  They
must pass IKE, which is the usual negotiation protocol for IPSEC tunnels
(UDP 500), as well as IPSEC itself (IP type 50).

If this is not possible most cleint VPN concentrators allow tunneling of
the protocols over a TCP or UDP connection.  The TCP is slightly slower
but more reliable.  You will have to contact your network/firewall
administrator to find out if these options are enabled and what ports to
use.

Allan

On Tue, Jul 20, 2004 at 10:28:39AM -0400, Christopher Fowler wrote:
> Does IPSec work behind firewalls and NAT devices.  I want to use it to
> connect to our home office from remote but when I go into datacenters
> 99.9% of the time I get an address that is private and behind a NAT
> Firewall.
> 
> Chris
> 
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale

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